THE 
NEW PHYTOLOGIST 
A BRITISH BOTANICAL JOURNAL 
EDITED BY 
A. G. TANSLEY, M.A, F.R.S. 
UNIVERSITY LECTURER IN BOTANY 
CAMBRIDGE 
IN CONSULTATION WITH THE STAFF OF 
THE CAMBRIDGE BOTANY SCHOOL 
VOLUME XXI 
PAGES viii and 300 
WITH NUMEROUS FIGURES 
IN THE TEXT 
LONDON 
WHELDON & WESLEY, Ltd. 
2) 3 & 4, ARTHUR ST., NEW OXFORD ST., W.C.2 
1922 
I 
